Based on the SBC-QS600 picture and block diagram presented on Compulab's website and shown above, I have 2 questions about Utilite2.

1. If one does not need cellular, can the cellular mini-PCIe socket (top socket in picture) be re-purposed for something such as a mini-PCIe SSD card?

As shown on the block-diagrams, the top mini-PCIe socket has got only USB interface (APQ8064 has only one PCIe interface which is taken by the GbE). So only USB-based modules can be used. Other than that, there are no limitations.

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2. Can a m-SATA SSD be added to the non-SSD Utilite2 model?

Yes. The bottom cover is removable. Utilite2 is designed to make both mSATA and cellular modem to be user serviceable / replaceable.

Generally the Snapdragon APQ8064 SoC and Utilite2 design support up-to 3GB DDR. In order to implement this memory capacity 8Gbit DDR chips are required. It seems that such chips do begin to emerge. It still remains to be seen whether the cost of these chips would be reasonable enough to justify the additional DRAM capacity on Utilite2.

I think a Utilite2 device with 3 GB RAM could make a big difference when it comes to the overall desktop experience. Some years ago 2 GB RAM were enough for most tasks but the situation seems to have changed with current web browsers.If you use a web browser like chromium with flash support enabled you might reach the 2 GB RAM limit with opening 5 tabs and using it for some minutes. While i am sure there could be something done on the software side to stop this wasting of RAM resources, actually no one has done it right now. Current workaround seems to be restarting the web browser.What type of DRAM is working with the Snapdragon 600 ? Could it use both LPDDR3 and LPDDR4 ?

Also, how will this affect your commitment to the current Utilite platform? There are still a large number of unresolved software issues like modern kernel support, igb stability and graphics drivers. I have given up trying to run XBMC on the Utilite because of stability and HDMI problems, but I could still find use for my Utilite Pro as a router if I could use the second ethernet interface.An update about the long-standing issues with the Utilite would be much appreciated.

Generally the Snapdragon APQ8064 SoC and Utilite2 design support up-to 3GB DDR. In order to implement this memory capacity 8Gbit DDR chips are required. It seems that such chips do begin to emerge. It still remains to be seen whether the cost of these chips would be reasonable enough to justify the additional DRAM capacity on Utilite2.